Which era ended with the largest mass extinction in Earth's history?

During which era did birds and small mammals begin to evolve?

Which era are we in now?

What does the rock and fossil record represent?

What is the largest division of geologic time?

What is the standard method that divides Earth's history into parts?

What is the death of a species?

What is the process in which minerals replace tissues?

What is a preserved remains or other evidence of an organism?

What is a mark or cavity?

What is a fossil from a specific time period?

What is a fossil formed by an animal's movement?

What is a mold filled with sediment?

What are unstable isotopes?

What is the process of figuring out how old an object is?

What is the most common method of absolute dating?

What is the time it takes for one-half of a radioactive sample to decay?

What is a missing layer of rock in a sequencing parallel rock layer?

What is the idea that younger rocks lie on top of older rocks?

What is a break in the geologic record?

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